How to make stylized hair from curves with flat tips?
I suck with curves and don't get how they work but for now i don't
  have motivation to learn it.


This will have to change in order to understand this answer.


Create three curve object. &#8679; ShiftA > Curve > Bezier


Taper
Bevel
HairCRV

 RMB select HairCRV and go to the properties panel and to the data section. In the Geometry settings set the other curves as the Bevel and Taper object respectively.  
 RMB select the taper curve and go into edit mode &#8633; Tab. Manipulating the curve will increase the depth of the tapered curve hairCRV.    This is, how a sharp ending can be achieved.
The Bevel curve influences the shape of the cross section along the curve.  
Position the curve. &#9096; CtrlD to duplicate, E to extrude, &#9096; CtrlT to change the tilt. &#9095; AltS to scale.

You can still change the taper or bevel curve. In the tutorial, there are multiple different bevel curve, to achieve a variety of shapes.
Don't forget to increase the resolution of the hairCRV in case of small detail along the taper curve.